Difference between revisions of "RF Band Pass Filters"
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* Double-tuned circuit filter | * Double-tuned circuit filter | ||
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* Based on [https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1991/12/page29/ The double-tuned Circuit: An experimenter's tutorial] | * Based on [https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1991/12/page29/ The double-tuned Circuit: An experimenter's tutorial] | ||
| + | ** [https://qrp-labs.com/images/bpfkit/bpf2.pdf QRP Labs design] - Commercially available at reasonable cost | ||
== Schematic == | == Schematic == | ||
Revision as of 12:06, 28 September 2021
A band pass filter (LPF) is used at the front end of a receiver, to attenuate strong out-of-band signals. Strong signals that reach the receiver’s first mixer and/or RF pre-amplifier cross-modulate and produce unwanted spurious responses at the receiver output
Design Details
- Double-tuned circuit filter
- Based on The double-tuned Circuit: An experimenter's tutorial
- QRP Labs design - Commercially available at reasonable cost
Schematic
Parts
